The sophisticated design of John's Only Pump gives you a hands-free operation because it stays on all by itself. Simply set the amount of vacuum you want inside the chamber and presto - your penis starts to grow~ You can adjust the ammount of vacuum in seconds anytime you wish and the pump releases instantly at our command. The donut sleeve will not tear and is easily washable. The domed clear plastic chamber is virtually indestructable. John's Only Pump got it's name because you'll never need another one!
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